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STRICTLY CONFIDENTIAL
Migrating Legacy Apps: A Practical Guide27th March 2019
Cloud Pathways to AWS
Aled Sage
1. Poorly documented setup and processes
2. Hard-wiring
3. Inter-dependencies
4. Limiting risk
5. “Well architected” applications
1. Introduction to cloud migration
2. Five key challenges
Agenda
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STRICTLY CONFIDENTIALIntroduction
1. Trade capital expense for variable expense
2. Benefit from massive economies of scale
3. Stop guessing capacity
4. Increase speed and agility
5. Stop spending money running and maintaining data centers
6. Go global in minutes
Why Cloud?
© Cloudsoft Corporation 2019 4Migrating to AWS, 27 March 2019
Source: https://docs.aws.amazon.com/aws-technical-content/latest/aws-overview/six-advantages-of-cloud-computing.html
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Migration Triggers
Source: https://www.linkedin.com/pulse/cloud-migration-triggers-steve-bryant-brown/
Cloud Migration Strategies
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Source: AWS Migration Strategieshttps://cloudsoft.io/a-practical-guide-to-understanding-the-6rs-for-migration-to-aws/
Cloud Migration Strategies
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• Organisational change
• Managing uncertainty
• AWS Cloud Adoption Framework (CAF)
• Business perspective
• People perspective
• Governance perspective
• Platform perspective
• Security perspective
• Operations perspective
Not Covered
© Cloudsoft Corporation 2019 8Migrating to AWS, 27 March 2019
STRICTLY CONFIDENTIALFive key challenges
1. Poorly documented setup and processes2. Hard-wiring3. Inter-dependencies4. Limiting risk5. “Well architected” applications
STRICTLY CONFIDENTIAL1. Poorly documented setup and processes
1. Poorly documented setup and processes2. Hard-wiring3. Inter-dependencies4. Limiting risk5. “Well architected” applications
Poorly documented setup and processes
© Cloudsoft Corporation 2019 11Migrating to AWS, 27 March 2019
Poorly documented setup and processes
© Cloudsoft Corporation 2019 12Migrating to AWS, 27 March 2019
• Snowflake servers: pets vs cattle
Poorly documented setup and processes
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• Is there a DR plan?
Poorly documented setup and processes
© Cloudsoft Corporation 2019 14Migrating to AWS, 27 March 2019
STRICTLY CONFIDENTIAL2. Hard-wiring
1. Poorly documented setup and processes2. Hard-wiring3. Inter-dependencies4. Limiting risk5. “Well architected” applications
Hard-wiring
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STRICTLY CONFIDENTIAL3. Inter-dependencies
1. Poorly documented setup and processes2. Hard-wiring3. Inter-dependencies4. Limiting risk5. “Well architected” applications
Inter-dependencies
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App
Inter-dependencies
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• VPNs (IPSec or OpenVPN)
• Direct Connect
Inter-dependencies
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• Discovery
Inter-dependencies
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Inter-dependencies
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• Listener
• Proxy
STRICTLY CONFIDENTIAL4. Limiting risk
1. Poorly documented setup and processes2. Hard-wiring3. Inter-dependencies4. Limiting risk5. “Well architected” applications
Limiting risk
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Limiting risk
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Limiting risk
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Image source: https://www.vulpoint.be/risk-management/
STRICTLY CONFIDENTIAL5. “Well architected” applications
1. Poorly documented setup and processes2. Hard-wiring3. Inter-dependencies4. Limiting risk5. “Well architected” applications
“Well architected” applications: legacy apps
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“Well architected” applications: legacy apps
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“Well architected” applications: startup app
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Single server?
Single point(s) of failure?
“Well architected” applications
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“Well architected” applications: operational excellence
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“Well architected” applications: operational excellence
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“Well architected” applications: operational excellence
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AWS Infrastructure & Services
Customer-facing app
A lot
to do!
“Well architected” applications: operational excellence
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AWS Infrastructure & Services
Customer-facing app
+Partner
“Well architected” applications: security
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“Well architected” applications: reliability
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“Well architected” applications: performance efficiency
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“Well architected” applications: cost optimisation
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https://go.cloudsoft.io/wellmigrated
• Speak to Cloudsoft
• Get cracking on your cloud migration:• Low-hanging fruit
• Gnarly app!
What Next?
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